Commit 2f23f486 authored by Vadim Fedorenko's avatar Vadim Fedorenko Committed by David S. Miller

ptp: ocp: Expose clock status drift and offset

Monitoring of clock variance could be done through checking
the offset and the drift updates that are applied to atomic
clocks.  Expose these values as attributes for the timecard.
Signed-off-by: default avatarVadim Fedorenko <vadfed@fb.com>
Signed-off-by: default avatarJonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9f492c4c
......@@ -52,6 +52,8 @@ struct ocp_reg {
u32 servo_offset_i;
u32 servo_drift_p;
u32 servo_drift_i;
u32 status_offset;
u32 status_drift;
};
#define OCP_CTRL_ENABLE BIT(0)
......@@ -1935,6 +1937,36 @@ available_clock_sources_show(struct device *dev,
}
static DEVICE_ATTR_RO(available_clock_sources);
static ssize_t
clock_status_drift_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ptp_ocp *bp = dev_get_drvdata(dev);
u32 val;
int res;
val = ioread32(&bp->reg->status_drift);
res = (val & ~INT_MAX) ? -1 : 1;
res *= (val & INT_MAX);
return sysfs_emit(buf, "%d\n", res);
}
static DEVICE_ATTR_RO(clock_status_drift);
static ssize_t
clock_status_offset_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ptp_ocp *bp = dev_get_drvdata(dev);
u32 val;
int res;
val = ioread32(&bp->reg->status_offset);
res = (val & ~INT_MAX) ? -1 : 1;
res *= (val & INT_MAX);
return sysfs_emit(buf, "%d\n", res);
}
static DEVICE_ATTR_RO(clock_status_offset);
static struct attribute *timecard_attrs[] = {
&dev_attr_serialnum.attr,
&dev_attr_gnss_sync.attr,
......@@ -1946,6 +1978,8 @@ static struct attribute *timecard_attrs[] = {
&dev_attr_sma4.attr,
&dev_attr_available_sma_inputs.attr,
&dev_attr_available_sma_outputs.attr,
&dev_attr_clock_status_drift.attr,
&dev_attr_clock_status_offset.attr,
&dev_attr_irig_b_mode.attr,
&dev_attr_utc_tai_offset.attr,
&dev_attr_ts_window_adjust.attr,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment